Open AccessFast voltage detection method for grid‐tied renewable energy generation systems under distorted grid voltage conditions
Author(s) -
Xiao Furong,
Dong Lei,
Li Li,
Liao Xiaozhong
Publication year - 2017
Publication title -
iet power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.637
H-Index - 77
eISSN - 1755-4543
pISSN - 1755-4535
DOI - 10.1049/iet-pel.2016.0738
Subject(s) - renewable energy , grid , voltage , computer science , electrical engineering , engineering , mathematics , geometry
A fast voltage detection method to assist with the low‐voltage ride‐through operation of grid‐tied renewable energy generation systems is proposed in this study. It is designed to detect every phase voltage, so that it can be applied in both three‐phase and single‐phase applications. The whole voltage detection approach consists of two stages, the pre‐filtering stage and the voltage detection stage. In the pre‐filtering stage, a cascaded delayed signal cancellation (CDSC) module and a low‐pass filter are connected in series to filter low‐order harmonics and high‐frequency noises. For eliminating the low‐order harmonics of interest, different types of CDSC methods are studied in detail. Subsequently, a new orthogonal signal generator is built to calculate the voltage amplitude in the voltage detection stage. Finally, the proposed voltage detection method is verified by experimental results.